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Net Income (Loss) Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2021
Jun. 30, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]            
Net income (loss) $ 20,424 $ 14,127 $ (4,299) $ 11,311 $ 34,551 $ 7,012
Weighted-average shares outstanding – basic (in shares) 43,262   42,659   43,113 42,509
Weighted-average shares outstanding — diluted (in shares) 47,106   42,659   46,765 43,616
Net income (loss) per share – basic (in dollars per share) $ 0.47   $ (0.10)   $ 0.80 $ 0.16
Net income (loss) per share – diluted (in dollars per share) $ 0.43   $ (0.10)   $ 0.74 $ 0.16
Restricted Stock Awards            
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]            
Effect of dilutive securities (in shares) 2,066   0   2,040 1,107
Anti-dilutive weighted-average shares (in shares) 199   4,931   290 1,929
Convertible Senior Notes and Warrants            
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]            
Effect of dilutive securities (in shares) 1,778   0   1,612 0
Anti-dilutive weighted-average shares (in shares) 5,908   0   5,908 0